Paltau-Cret Formation

Paltau-Cret Fm

Period:

Cretaceous

Age Interval:

Santonian- Maastrichtian, CK5

Province:
Chatkal-Kuramin Region

Type Locality and Naming

Along the Paltau stream and Paltau Mountain, Chatkal Ridge. I.M. Abdurazimov in 1999. Stratotype on the left bank of the Chatkal River, at the confluence of the Paltau stream.

Synonym: Paltau Topitsa, Пальтауская т.

Lithology and Thickness

In the stratotype, the unit is divided into three sub-units. Lower sub-unit is represented by fine-grained sandstones, siltstone (aleurolites), reddish-brown, spotted clays with layers of conglomerates. Thickness 75m. Middle sub-unit - pinkish-red siltstone (aleurolites) and reddish-pinkish-brown aleurolitic clays. Thickness 52m. To the north of the stratotype, in the area of the village of Teper, the sub-t. is characterized by an alternation of sands, fine-, mixed-, and coarse-grained quartz-mica sandstones, pinkish-gray and poorly sorted gravels with dinosaur bone fragments. Upper sub-unit consists of conglomerates, variegated gray, reddish-brown, fine-grained gray, bluish-gray and spotted. Thickness 78m. To the north and northeast of the stratotype, in the sub-t. predominate spotted clays and siltstone (aleurolites).

Lithology Pattern:

Siltstone

Relationships and Distribution

Lower contact

Conformably overlies the Paleozoic

Upper contact

It is overlain by the Paleocene with erosion

Regional extent

Suburbs of the Chatkal and Ugamsky Ridges.

GeoJSON

null

Fossils

This formation does not contain organic remains.

Age

Conditionally attributed to the upper Santonian-Maastrichtian. Used in the legend of the Chatkal-Kuramin subseries for geological maps of the 1:200000, 2000r. (A.I. Kim et al., 2000f.).

Age Span:

Beginning stage:

Santonian

Fraction up in beginning stage:

0.8

Beginning date (Ma):

84.06

Ending stage:

Maastrichtian

Fraction up in the ending stage:

0.5

Ending date (Ma):

69.11

Depositional setting

Depositional pattern:

Additional Information

Compiler:

– In: GeoGPT translation of: “Abduazimova, Z.M. (Ed.), 2001. Stratigraphic Dictionary of Uzbekistan. IMR (Institute of Mineral Resources), Tashkent, 580 pp. (In Russian)”